(gdb) b main
Breakpoint 1 at 0x80a2cd6: file main.c, line 288.
(gdb) r
Starting program: /usr/local/bin/gimp-2.5 ./IMG_7638.CR2
[Thread debugging using libthread_db enabled]
[New Thread 0xb71f5720 (LWP 22428)]
[Switching to Thread 0xb71f5720 (LWP 22428)]

Breakpoint 1, main (argc=2, argv=0xbfb86154) at main.c:288
288	  GError         *error = NULL;
(gdb) s
293	  g_thread_init (NULL);